Topic 4 - The Tissue Level of Organization Flashcards
(60 cards)
Epithelium is capable of replacement by cell ______.
Mitosis
Function in absorption, secretion, and/or protection; usually highly innervated
Epithelium
Dingle layer of thin, flattened cells.
Simple Squamous Epithelium
Epithelium always has a free surface, underside of which is anchored to connectivetissue via a ________ ________.
Basement Membrane
Found where substances need to move easily across a membrane (e.g., air sacs of lungs, walls of capillaries, Bowman’s capsule of thekidneys, surface membrane layer lining internal body cavities)
Simple Squamous Epithelium
Single layer of cube-shaped cells.
Simple Cuboidal Epithelium
Found lining small ducts/tubules that may have excretory, secretory, or absorptive functions (e.g., surface of the ovaries, lining of smaller salivary gland ducts and sweat gland ducts, portions of kidney tubules)
Simple Cuboidal Epithelium
Single layer of elongated cells, with the cell nucleus usually located DEEP in the cell, near the basement membrane
Simple Columnar Epithelium
Found in the linings of uterus and uterine tubes and various organs ofthe digestive tract (i.e., stomach, intestines, gall bladder), collecting ducts of kidneys
Simple Columnar Epithelium
May be equipped with microvilli on free surface to increase absorptive properties, plus goblet cells, which secrete mucus onto free surface; or, with goblet cells and cilia on free surface to move fluids or particlesalong a passageway
Simple Columnar Epithelium
Single layer of columnar epithelium in which cell nucleus is located at any level within the cell, not necessarily next to the basement membrane; all cells are anchored to the basement membrane, but notall reach the free surface
Pseudostratified Columnar Epithelium
Found in linings of upper respiratory system and lining some tubes ofthe male reproductive tract
Pseudostratified Columnar Epithelium
Multiple layers (10-20) of epithelial cells, of which the cells near the free surface are squamosal (i.e., thin and flattened); deeper layers tend tobe cuboidal or columnar
Stratified Squamous Epithelium
Makes up the epidermis of the skin
KERATINIZED Stratified Squamous Epithelium
Two-to-three layers of cuboidal epithelial cells, forming lining around alumen
Stratified Cuboidal Epithelium
Limited to linings of larger glandular ducts (i.e., sweat glands, salivary glands, and pancreas); mainly protective in function
Stratified Cuboidal Epithelium
Several layers of cells with columnar cells at the free surface and cuboidal cells at the basement membrane
Stratified Columnar Epithelium
Found in parts of the pharynx and parts of the male urethra and vas deferens; mainly protective in function.
Stratified Columnar Epithelium
Consists of several layers of cuboidal cells, specialized to permit stretching and recoil.
Transitional Epithelium
Forms inner lining of urinary bladder and part of ureters and urethra, adjacent to bladder
Transitional Epithelium
Composed of epithelial cells specialized to produce and secrete substances into ducts or body fluids. usually located within columnar or cuboidal epithelium.
Glandular Epithelium
Secrete products (i.e. hormones) directly into to tissue fluid or blood vessels; highly vascularized
Endocrine Glads - Ductless
Secrete products into ducts that open onto internal or external surfaces.
Exocrine Glands - Have Ducts
The only unicellular exocrine gland.
Goblet Cells
